A Study on the Stability of MgO in a LiCl-Li<sub>2</sub>O Molten Salt System

Jin-Mok Hur; Ik-Soo Kim; Won-Kyoung Lee; Soo-Haeng Cho; Chung-Seok Seo; Seong-Won Park

Journal of Industrial and Engineering Chemistry, Vol.10, No.3, 442-444, May, 2004

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A Study on the Stability of MgO in a LiCl-Li₂O Molten Salt System

Jin-Mok Hur^†, Ik-Soo Kim, Won-Kyoung Lee, Soo-Haeng Cho, Chung-Seok Seo, and Seong-Won Park

Korea Atomic Energy Research Institute, Daejeon 305-600, Korea

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The stability of MgO was studied to verify its applicability to the LiCl-Li₂O molten salt based process. The interaction of MgO not only with molten salt but also with CO₂ and H₂O in relation to its property as a solid base was investigated. MgO was chemically stable at the typical operation temperature of the LiCI-Li₂O molten salt based process, 650 ℃. However, the stabilization of Li₂O structure on a MgO surface was observed when MgO is withdrawn from the molten salt. The result was clearly characterized by means of thermogravimmetry analysis, differential thermal analysis, X-ray diffraction analysis, thermodynamic analysis, and a CO₂ temperature programmed desorption. MgO can be considered as an acceptable candidate material for the high temperature molten salt industry.

Keywords:MgO;stability;LiCl;Li₂O;molten salt

[References]

Gourishankar K, Redey L, Williamson M, Light Metals, 1075 (2002)
Gourishankar K, Redey L, Graziano D, Proc. of the TMS 132nd Annual Meeting & Exhibition (2003)
Kurata M, Ohta H, Kinoshita K, Inoue T, Prog. of Annual Meeting of the A.E. S.J., 610 (2002)
Indacochea JE, Smith JL, Litko KR, Karell EJ, J. Mater. Res., 14, 1990 (1999)
Indacochea JE, Smith JL, Litko KR, Karell EJ, Raraz AG, Oxid. Met., 55, 1 (2001)
Hur JM, Seo CS, Hong SS, Kang DS, Park SW, React. Kinet. Catal. Lett., 80, 217 (2003)
Hur JM, Seo CS, Kim IS, Hong SS, Kang DS, Park SW, Proc. of WM'03 Conference (2003)
Hattori H, Chem. Rev., 95(3), 537 (1995)
Kubaschewski O, Alcock CB, Metallurgical Thermochemistry, 5th Eds., Pergamon Press (1979)
Antolini E, Mater. Lett., 51, 385 (2001)
Zhanpeisov NU, Staemmler V, Baerns M, J. Mol. Catal. A-Chem., 101, 51 (1995)

[Referenced By]

[1] Gourishankar K, Redey L, Williamson M, Light Metals, 1075 (2002)

[2] Gourishankar K, Redey L, Graziano D, Proc. of the TMS 132nd Annual Meeting & Exhibition (2003)

[3] Kurata M, Ohta H, Kinoshita K, Inoue T, Prog. of Annual Meeting of the A.E. S.J., 610 (2002)

[4] Indacochea JE, Smith JL, Litko KR, Karell EJ, J. Mater. Res., 14, 1990 (1999)

[5] Indacochea JE, Smith JL, Litko KR, Karell EJ, Raraz AG, Oxid. Met., 55, 1 (2001)

[6] Hur JM, Seo CS, Hong SS, Kang DS, Park SW, React. Kinet. Catal. Lett., 80, 217 (2003)

[7] Hur JM, Seo CS, Kim IS, Hong SS, Kang DS, Park SW, Proc. of WM'03 Conference (2003)

[8] Hattori H, Chem. Rev., 95(3), 537 (1995)

[9] Kubaschewski O, Alcock CB, Metallurgical Thermochemistry, 5th Eds., Pergamon Press (1979)

[10] Antolini E, Mater. Lett., 51, 385 (2001)

[11] Zhanpeisov NU, Staemmler V, Baerns M, J. Mol. Catal. A-Chem., 101, 51 (1995)